Have you noticed that some of the LED luminous characters on the street are still the same as new after three years, while others have only been missing strokes and strokes? Today, let’s open the outer shell of the LED screen and take you to see what’s inside.Where are the core components hidden?​. Let me tell you a real story - a chain store changed three batches of luminous words last year, and finally found that the power module was installed in the wrong location. This was a waste of money to open three branches!

1. Where is the "five internal organs" that have the luminous characters hidden?

1. ​​Lanner Bead Array: Soul Painter in the Glyph​

• ​Location​: Close to the inner side of the acrylic panel, spaced 5-8mm apart
• ​Doors and tricks​：
  • The turning points of the stroke must be encrypted (for example, the "hook" part should have 30% more lamp beads)
  • The most deceptive design I've ever seen: The "O" circle of the lower half of the LOGO in a fast food restaurant is too large, and it looks like a crescent at night

The three-dimensional characters made for a shopping mall in Singapore last year are​The intersection of strokes​Double-layer lamp bead layout was made. The measured brightness uniformity is increased by 40%, and there will be no dark areas when standing 50 meters away.

2. Drive power supply: the "heart" of the word screen

• ​Best Location​：
  • Vertical installation: hidden under the rain-proof eaves on the top of the font shell
  • Wall-mounted installation: place it in the maintenance port on the back of the font
• ​​Lessons of blood and tears​​：
  A landmark in a scenic spot puts the power supply at the bottom, and the water inlet is short circuited during the rainy season. Now we all ask30cm off the ground + IP67 protection​, the same level as the diving watch

3. Control card: the "brain" of intelligent dimming

• ​​Three principles of hiding​：
  1. Stay away from high temperature zones (don't squeeze with lamp beads)
  2. Close to signal access point (reduce line loss)
  3. Reserved maintenance space (at least the size of a fist)

Take a chestnut: The gradient glowing words of a duty-free shop in South Korea, scattering the control card in​The connection of each stroke​​. Even if it is broken, it will not affect the overall effect. I will give you a full mark in this design.

4. Wire layout: "Vascular Network" of the character screen

• ​​Qualification standards​：
  • Power cord: 18AWG silicone wire (temperature resistance of 200℃)
  • Signal line: double shielded twisted pair wire (proof of electromagnetic interference)
• ​​Reverse textbook​：
  A certain auto 4S store uses ordinary wires. In winter, the wire becomes brittle at minus 15℃, and it breaks into a "Morse code" when the wind blows.

5. Structural Bracket: Invisible Guardian

• ​Material selection​：
  • Coastal areas: 316 stainless steel must be used (ordinary 304 can't last for three years)
  • Alpine areas: need to carry a self-heating coating (no freezing at minus 30℃)
• ​​Innovative design​：
  Giant luminous characters from a Japanese stadium were buried inside the bracketTemperature sensor​, can automatically adjust the speed of the cooling fan

2. Procurement prevention guide (take note of the key points!)

1. The brighter the lamp bead, the better

• ​Indoor words​: 120-150cd/m² is the most comfortable (equivalent to the brightness of the desk lamp)
• ​Outdoor words​: 800-1200cd/m² is enough (don’t believe those nominally 3000cd, they are purely electric bill killers)
• ​​Measured data​：
  A chain of pharmacies uses ultra-high light beads, and the electricity bill for three months is more expensive than rent. Finally, I spent money to install a dimming system.

2. Waterproof ≠universal

• ​​Three steps for moisture-proof testing​：
  1. 24 hours in the pool (don't laugh, someone really does this)
  2. High temperature steaming test (simulated sauna day)
  3. Hot and cold shock test (instant switching from -40℃ to 85℃)
• ​Industry Confidential​：
  A truly reliable waterproofing is not based on glue, butStructural waterproof​. Just like a high-end watch, it eliminates water vapor by precision bite

3. Don't be fooled by "imported components"

• ​​Comparison list​：

  Component Type	Domestic high-quality models	Imported model of the same level	Price spread
  LED light beads	San'an 2835	Niya 219B	3 times
  Drive power supply	HLG	Philips Xitanium	2.5 times
  (Note: The actual effect difference is <10%)

The three-year failure rate of the complete set of domestic components that helped Southeast Asian customers last year was only 0.7%, which was lower than that of some imported brands.

3. The private words of the master of ten years

I have been working in LED projects for more than ten years, and I will tell you a few truths:

1. ​Don't save money on terminals​: I have seen too many fires caused by inferior terminals
2. ​​Leave a maintenance channel​​: When pretending to be a character, he is as handsome as Daniel Wu, but when he edits his character, he is miserable and takes out a toilet.
3. ​Dynamic maintenance is more important​：
   • Check the wire aging once a month
   • Clean the heat dissipation holes every quarter
   • Update control programs every year

The new plan I am working on recently is quite interesting - install every luminous wordIntelligent monitoring module​, check the component status at any time on the mobile APP. The operation and maintenance cost of a commercial street project under test will be cut in half, and this technology will sooner or later become popular.

After all, finding LED font screen components is like playing hide and seek. You must understand structural design and be able to arrange troops. Next time you see the glowing signs on the street, you might as well take a look at them - those small components hidden in the corners are silently performing their lighting legend!

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